<template>
  <div class="todo-footer">
    <label>
      <input type="checkbox" v-model="isChecked" />
    </label>
    <span>
      <span>已完成{{doneTotal}}</span> / 全部{{todoList.length}}
    </span>
    <button class="btn btn-danger" @click="handleDelete">清除已完成任务</button>
  </div>
</template>

<script>
export default {
  name: 'FooterView',
  // props: ['todoList', 'allCheck', 'onAllDelete'],
  props: ['todoList'],
  computed: {
    isChecked: {
      get() {
        return this.doneTotal === this.todoList.length && this.todoList.length > 0
      },
      set(check) {
        // this.allCheck(check)
        this.$emit('allCheck', check)
      }
    },
    doneTotal() {
      return this.todoList.reduce((pre, current) => {
        return pre + (current.done ? 1 : 0);
      }, 0)
    },
  },
  methods: {
    // handleClick(e) {
    //   this.allCheck(e.target.checked)
    // },
    handleDelete() {
      if (confirm('确定清除已完成任务吗？')) {
        // this.onAllDelete()
        this.$emit('onAllDelete')
      }
    }
  }
}
</script>

<style lang="less" scoped>

/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}

</style>